Free convection in a porous horizontal cylindrical annulus with a nanofluid using Buongiorno's model

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Natural convection flow in a porous concentric horizontal annulus saturated with a water based nanofluid is numerically investigated. The mathematical model used is of single-phase and is formulated in dimensionless stream function and temperature taking into account the Darcy-Boussinesq approximation and the nanofluid model proposed by Buongiorno. The transformed dimensionless partial differential equations have been solved using a second-order accurate finite-difference technique. The results indicate that inclusion of nanoparticles into pure water changes the flow structure at low values of the Rayleigh number.

Original languageEnglish
Pages (from-to)182-190
Number of pages9
JournalComputers and Fluids
Publication statusPublished - 2 Sep 2015



  • Buongiorno model
  • Free convection
  • Horizontal annulus
  • Nanofluids
  • Numerical method
  • Porous medium

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

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